Revert "CSS Custom Properties (Variables)"

third_party/WebKit/Source/core/css/parser/CSSVariableParser.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSVariableParser.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSVariableParser.cpp b/third_party/WebKit/Source/core/css/parser/CSSVariableParser.cpp
deleted file mode 100644
index 94463b1da72db65a904d8b080e501377ac49d21c..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/css/parser/CSSVariableParser.cpp
+++ /dev/null
@@ -1,123 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "config.h"
-#include "core/css/parser/CSSVariableParser.h"
-
-#include "core/css/CSSCustomPropertyDeclaration.h"
-#include "core/css/parser/CSSParserTokenRange.h"
-#include "core/css/parser/CSSParserValues.h"
-
-namespace blink {
-
-bool CSSVariableParser::isValidVariableName(const CSSParserToken& token)
-{
-    if (token.type() != IdentToken)
-        return false;
-
-    CSSParserString value = token.value();
-    return value.length() >= 2 && value[0] == '-' && value[1] == '-';
-}
-
-bool isValidVariableReference(CSSParserTokenRange);
-
-bool classifyBlock(CSSParserTokenRange range, bool& hasReferences, bool isTopLevelBlock = true)
-{
-    while (!range.atEnd()) {
-        if (range.peek().blockType() == CSSParserToken::BlockStart) {
-            const CSSParserToken& token = range.peek();
-            CSSParserTokenRange block = range.consumeBlock();
-            if (token.functionId() == CSSValueVar) {
-                if (!isValidVariableReference(block))
-                    return false; // Bail if any references are invalid
-                hasReferences = true;
-                continue;
-            }
-            if (!classifyBlock(block, hasReferences, false))
-                return false;
-            continue;
-        }
-
-        ASSERT(range.peek().blockType() != CSSParserToken::BlockEnd);
-
-        const CSSParserToken& token = range.consume();
-        switch (token.type()) {
-        case DelimiterToken: {
-            if (token.delimiter() == '!' && isTopLevelBlock)
-                return false;
-            break;
-        }
-        case RightParenthesisToken:
-        case RightBraceToken:
-        case RightBracketToken:
-        case BadStringToken:
-        case BadUrlToken:
-            return false;
-        case SemicolonToken:
-            if (isTopLevelBlock)
-                return false;
-            break;
-        default:
-            break;
-        }
-    }
-    return true;
-}
-
-bool isValidVariableReference(CSSParserTokenRange range)
-{
-    range.consumeWhitespace();
-    if (!CSSVariableParser::isValidVariableName(range.consumeIncludingWhitespace()))
-        return false;
-    if (range.atEnd())
-        return true;
-
-    if (range.consume().type() != CommaToken)
-        return false;
-    if (range.atEnd())
-        return false;
-
-    bool hasReferences = false;
-    return classifyBlock(range, hasReferences);
-}
-
-static CSSValueID classifyVariableRange(CSSParserTokenRange range, bool& hasReferences)
-{
-    hasReferences = false;
-
-    range.consumeWhitespace();
-    if (range.peek().type() == IdentToken) {
-        CSSValueID id = range.consumeIncludingWhitespace().id();
-        if (range.atEnd() && (id == CSSValueInherit || id == CSSValueInitial || id == CSSValueUnset))
-            return id;
-    }
-
-    if (classifyBlock(range, hasReferences))
-        return CSSValueInternalVariableValue;
-    return CSSValueInvalid;
-}
-
-bool CSSVariableParser::containsValidVariableReferences(CSSParserTokenRange range)
-{
-    bool hasReferences;
-    CSSValueID type = classifyVariableRange(range, hasReferences);
-    return type == CSSValueInternalVariableValue && hasReferences;
-}
-
-PassRefPtrWillBeRawPtr<CSSCustomPropertyDeclaration> CSSVariableParser::parseDeclarationValue(const AtomicString& variableName, CSSParserTokenRange range)
-{
-    if (range.atEnd())
-        return nullptr;
-
-    bool hasReferences;
-    CSSValueID type = classifyVariableRange(range, hasReferences);
-
-    if (type == CSSValueInvalid)
-        return nullptr;
-    if (type == CSSValueInternalVariableValue)
-        return CSSCustomPropertyDeclaration::create(variableName, CSSVariableData::create(range, hasReferences));
-    return CSSCustomPropertyDeclaration::create(variableName, type);
-}
-
-} // namespace blink